Black-Tailed Skimmer

Orthetrum cancellatum

The black-tailed skimmer is a dragonfly belonging to the family Libellulidae. Source

Where it is now

In the last 8 weeks this insect was recorded 10 times across 1 area (each area is a 5 degree square).

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Movement and weather

Each season it is first heard regularly where daytime highs are around 22°C (typically 16 to 23°C, from 6 areas).

Arrival dates

The week it was first heard regularly in each region, after at least six weeks away. Dates differ from south to north, so a region has a range.

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Figures are effort corrected and come from automatic sound identification, which makes mistakes. How this is measured and how it compares with human observers.